US3305559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phthalocyanine dyestuffs
Assignee: Hoechst AG
•
Filing: 1964-06-09
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Granted: 1967-02-21
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Expires: 1984-06-09
Abstract
No abstract record available.
Inventors
- 👤 Kuhne Rudolf
- 👤 Meininger Fritz
- 👤 Frolich Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:34
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/002; C09B62/006; C09B62/44; C09B62/4401; C09B62/4403; C09B62/523; C09B62/527; D; D06; D06P; D06P1/00; D06P1/38; D06P1/384; Y; Y10; Y10S; Y10S534/00; Y10S534/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
THE PHTHALOCYANNIE DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
6 words
THE PHTHALOCYANNIE DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US3114746A
Cited
US3232931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |